Window



Oct. 9, 1951 E. CLERK 2,570,523

WINDOW Filed July 25, 1947 3 Sheets-Sheet l INVENTOR EDOUARDCLERK AT N EYS Qct. 9, 1951 Filed July 25, 1947 E. CLERK WINDOW 3 Sheets-Sheet 2 \wm Z /////////l/// M/AW/ m vnnon EDOUARD CLERK A l'l'O EYS Patented Oct. 9, 1951 v 2 1 UNITED wmnow I Edouard Clerk, St. Hilaire, Quebec, Canada Application July 25, 1947,- Serial No. 763,558

This invention relates to improvements in windows of the sliding sash type.

One object of this invention is the provision of an insulated all-metal window in which thermal transmission from the inside to the outside is substantially reduced by a novel arrangement of Weatherstripping between the sashes and the sash frame and between complementary sections of the component rails ofthe sashes themselves.

Another object of the invention is to provide a window of the sliding sash type in which the sashes are guided by Weatherstripping elements projecting from the side rails of the sashes into vertical recesses in the jambs of the window frame and are interconnected so that the sashes balance each other and may be operated in unison by raising and lowering the lower sash.

Another object of the invention is the provision of a window of the sliding sash type in which the side rails of each sash are provided with removable Weatherstripping elements working in the recesses provided in the side jambs of the window frame and in Which'the upper and lower ends of the Weatherstripping elements carried by the lower sash are connected to the corresponding ends of the Weatherstripping elements of the upper sash by flexible connections which are trained around pulleys carried by the side jambs of the window frame so that each sash is counterbalanced by the companion sash.

Other objects, advantages and characteristic features of the invention will be more readily understood from the following detailed descrip tion of the preferred embodiment shown in the accompanying drawings, in which- Fig. l is a vertical sectional view of a window construction embodying my invention;

Fig. 2 is a horizontal section taken substantially along the section line 22 of Fig. 1.

Fig. 3 is an enlarged perspective view of a lower corner portion of the frame and lower sash shown in the preceding figures.

Fig. 4 is an enlarged detail view showing a portion of the side rail construction of the lower sash.

Fig. 5 is a sectional view along the line 55 of Fig. 1.

Referring more particularly to the drawings, 5 designates a metal sash frame equipped with upper and lower sliding sashes 6 and 1.

The sill I, head 2, and jambs 3, of window frame 5 are preferably made of aluminum. Sill I is supported in place by downwardly extending legs 8 resting on the wall structure 9 at the bottomof' the window opening. A pocket for the reception of a caulking compound i0 is I wardly projecting legs I! butted against the wall structure at the top of the window opening. The recesses or pockets formed by and between the legs I! may be filled with a suitable caulking compound. At the outdoor side of the window frame, the head 2 is provided with an upwardly offset portion l8 afiording a downwardly opening recess IS. The outer side wall of recess I9 is continued downwardly to provide a flange 20. A pocket for the'reception of a caulking compound 2! is formed by a flange 22 projecting outwardly from flange 20.

7 Each jamb 3 of window frame 5 is formed with a central vertically extending parting-strip recess 24 (Figs. 2 and 3) flanked by vertically extending Weatherstrip receiving recesses 25 and 26 having their side walls serrated as indicated at 26a. Each jamb 3 is also formed with leg extensions 2! which are butted against the wall structure at the adjacent side of the window opening and form a pocket that may be filled with a suitable caulking compound. At the outdoor side of the window the outer wall of each jamb recess 26 is continued inwardly to form a flange 21a in line with the head flange 20 and that portion of the outer sill leg 8 which extends above the sill flange ll. A flange 28 extends outwardly from the jamb flange 21a and forms a pocket which is filled with a caulking compound 30.

As clearly shown in Fig. 1, the outdoor side of window frame 5 presents a recess 32 having its bottom wall formed by outer sill legs 8, head flange 20 and jamb flanges 21a and having its side walls formed by the flanges ll, 22 and '28. Recess 32 is adapted to receive therein a screen or storm sash.

1 Metal parting strips 34 are fitted in the parting-strip recesses 24 f the window frame jambs 3. The. inner corner portions of each partingstrip are formed with laterally projecting beads 35.

. The bottom rail of lower sash 1 (Fig. 1) is made in two parts comprising a facing section 31 secured to the indoor side of a main section 38,

The main rail section 38 comprises a web 39 provided with upwardly projecting marginal legs 48 and 4| and downwardly projecting marginal legs 42 and 43. The flanges 48 and 42 at the indoor side of main rail section 38 are fitted in a groove 44 in facing section 31. The upper edge of facing section 3! is formed with oppositely directed flange 45 and 41. The flange 46 overhangs a glazing channel formed by the web 39 and upwardly projecting legs 48 and 4| of rail section 38. The remaining flange 41 of rail section 31 provides a hand grip for raising and lowering the lower sash. The lower portion of facing section 31 is formed with a Weatherstrip-receiving groove 49 opposed to a similar groove 58 in a leg member 5! extending downwardly from an intermediate portion of the web 39 of main rail section 38. A metallic Weatherstrip holder 52 is slidably fitted in each of the grooves 49 and 50 and carries a non-metallic weatherstrip 54 provided with a relatively thick nap 54a opposed to the nap of the companion Weatherstrip. The side edges of each Weatherstrip holder 52 are folded inwardlyinto clamping engagement with the marginal edges of the associated Weatherstrip. and are slidably accommodated in recesses provided in the side walls of the groove in which the holder is fitted. The downwardly directed legs 42 and 5| of rail section 38 form, with the lower portion of facing section 31, a downwardly opening pocket 55 in which the upwardly projecting leg I4 of frame sill I is received when the lower sash I is in its lowermost position. When leg I4 extends into pocket 55 its indoor and outdoor sides are engaged by the napped surfaces 54a. of the weatherstrips 54. 7

Each side rail of lower sash I comprises a facing section 5I (Fig. 2) secured to the indoor side of a main section 58 by screws 58a. The main section 58 comprises a web 59, having an inwardly directed flange 68 at'the outdoor edge thereof. Web 59 is provided with additional flanges BI and 62 defining a Weatherstrip groove 63 opening toward the adjacent jamb 3 and a groove 64 opening toward the indoor side of the window. A Weatherstrip holder 65 is slidably fitted in groove 63 and is provided with a tongue 66 projecting into the Weatherstrip recess 25 of the adjacent window frame jamb 3. A U-shaped metal plate 6! is fitted over tongue 66 and carries a weatherstrip 58 having a relatively heavy nap 68a in which the ridges of the serrated side walls of recess 25 are embedded to give an efficient Weatherstripping effect. Weatherstrip 61 is folded to embrace the folded edges and sides of plate 51 and is provided with cord-reinforced or beaded edges over which the side edges of plate 61 are rolled as indicated at 69. The rolled edges of plate 6! are held in grooves I provided in weatherstrip holder 65 at the base of tongue 66. The facing section of the side sill of each lower sash is provided with a tongue I2 extending into the groove 64 of main side rail section 58. A U-shaped metal Weatherstrip holder I3 is fitted on tongue I2 and carries a Weatherstrip I4. Weatherstrip I4 is folded over holder I2 and has its side edges turned outwardly to provide flaps I6 which are inter-posed between main rail section 58 and facing section 51 to reduce direct metalto-metal contact between said sections. Intermediate portions of Weatherstrip I4 are folded around and secured to cords I8 to provide substantially cylindrical anchoring portions which are held in groove. provided in facing section 51 at the base of tongue I 2.'- Ridges 8i projecting inwardly from the side walls of groove 64 engage Weatherstrip I4 to give an efficient weatherstripping effect. A portion of the side rail facing section 5! is opposed to the flange of main rail section 59 to provide a side rail continuation of the glazing channel formed by the flanges 40 and M of the bottom sash rail.

The top rail of the lower sash comprises a facing section 82 (Fig. 1) and a main section 83 which are substantial duplicates of the facing and main sections of the side rails. Facing section 82 is provided with a tongue 85 extending into groove 86 of main section 83 and equipped with a Weatherstrip holder and Weatherstrip corresponding to the previously mentioned holder I3 and Weatherstrip I4. A flange 98 extends downwardly'from h Outdoor edge of the web- 9| of the main top rail section 83 and is opposed to a portion of the facing section 82 to complete the glazing channel in which a glazing unit 92, preferably of the multi-pane type, is secured by a suitable caulking compound 93.

At the outdoor side of glazing unit 92 the top rail of lower sash I is formed with a downwardly opening pocket 95... The side walls of pocket 95 are formed with inwardly facing grooves 96 in which are fitted Weatherstrip holders 9I equipped with weatherstrips 98. The holders 91 and weatherstrips 98 are duplicates of the previously described holders 52 and weatherstrips 54 applied to the bottom rail of the lower sash.

The main top and bottom rail sections of the lower sash are secured to the main side rail sec tion by corner angles 99 which are fitted in grooves I58 and welded or otherwise secured in place.

The bottom rail IDI of upper sash 5 is made in one piece and is formed with a glazing channel I82 in which is fitted the lower edge 'of a multi! pane glazing unit I83. A flange I04 extends as wardly from rail [Ill and terminates in an upwardly directed tongue I05; ,When the two sashes are, positioned as shown'in Fig. 1, the bottom rail tongue I85 of the upper sash is received in the top rail pocket 95 of the lower sash and is engaged by the weatherstrips 98.

The side and top rails of the upper sash are shown as duplicates of the corresponding rails of the lower sash and therefore. need not be described in detail. In this connection it. is deemed sufilcient to point out. that the side rails of the upper sash are fitted with Weatherstrip holders I06 and weatherstrips I8! (Fig. 2) corresponding to the previously mentioned holders 65 and weatherstrips 61' carried bythe side rails of the lower sash. The weatherstrips I81 of the upper sash work in the Weatherstrip recesses 26 of the adjacent window frame jambs 3.

A Weatherstrip holder I09 (Fig. 1') is fitted in an upwardly facingwgroo've. H9 in the top rail of the upper sash and has a tongue III which extends upwardly into the head recess [9 of the window frame and carries aweatherstrip I I2 corresponding to the previously mentioned weathers strips shown at 61 and I 81. The component rails of the upper sash are secured together by corner angles I I3 corresponding to the corner angles. 99 of the lower sash.

The sashes 6 and I are connectedtogether at each side of the window frame by upper and lower flexible metal bands I I6 and I II, which are trained around upper and lower pulleys H8 and [I9 located within the width of the parting strip 34 Each'upper band H6 is providedwith terminal anchoring loops I20 and I2I. The loop"I2U.of bands II6. are anchored by screws I22 to the'upper ends of the Weatherstrip holders .65 mounted in the side rails of the lower sash. The remaining loops I2I of bands H6 aresimilarly anchored to the upper ends of the Weatherstrip holders I06 mounted in the side rails of the upper-sash.

The lower bands II'I are provided at one'end with anchoring loops I25 and at the other end with anchoring loops I26. The loops I25 are anchored by screws I21 to the lower ends of the Weatherstrip holders 65 of the lower sash and the loops I26 are anchored by screws I28 to the lower ends of the Weatherstrip holders I06 of the upper sash. The bands H6 and I" travel close to the sides of the parting strips 31 and are substantially concealed by the parting strip corner beads 35.

As indicated in Fig. 1 by dotted line I30, each of the lower sash Weatherstripping units comprising holder 65, plates 61 andweatherstrip 68, is preferably divided horizontally into upper and lower sections. This facilitates placement and removal of said units since it permits the upper section to be inserted and removed from'the top of the sash and the lower section to be inserted and removed from the bottom of the sash. Similarly, each of the correspondingweatherstripping units carried by the side rails of the upper sash may be likewise divided into upper and lower sections.

An important feature of the window described herein is that the sashes may be manipulated to give any desired degree of direct or indirect ventilation. For example, if the lower sash is raised approximately one inch from its lowermost position, the upper sash will be moved downwardly a correspondin distance through the agency of the sash connecting bands I I6 and I I! and the meeting rails of the two sashes will move apart a distance of approximately two inches. The sashes are designed so that the two inch separation of the meeting rails withdraws the bottom rail tongue I65 of upper sash 6 from the downwardly opening top rail pocket 95 of lower sash I and thus permits indirect ventilation or aeration to take place at the gap between the meeting rails of the sashes, while the sash-engaging leg I4 of frame sill I is still engaged by the weatherstrips 54 in the bottom rail groove 49 of lower sash 'I to prevent direct ventilation between the frame sill and the lower sash. When the meeting rails of the two sashes are separated a distance of two inches the top rail Weatherstrip II2 of the upper sash will be lowered to a position where it is just blocking the mouth of the recess I9 in the head of the window frame. A slight furtherraising of the lower sash will therefore further lower the top rail Weatherstrip II2 of the upper sash to permit ventilation between the top rail of the upper sash and the head of the window frame, as well as between the meeting rails of the two sashes while the sill leg I4 of the window frame is still extending a sufiieient distance into the bottom rail groove 49 of the lower sash to prevent ventilation between the lower sash and the sill of the window frame. If the lower sash is now raised a further distance ventilation will also take place between the lower sash and the sill of the window frame. The maximum degree of ventilation is obtained when the sashes are shifted to a position where the top and bottom rails of the lower sash lie directly opposite the corresponding rails of the upper sash. In this position of the sashes the area of daylight opening as measured from the sill of the window frame to the bottom rails of the sashes or as measured from the head of the window frame to the top rails of the sashes is equal in height to only a quarter the total height of the window opening bounded by the window frame as compared with ordinary sashes in which the sashes may be positioned opposite to each other to give an area opening which is equal in height to half the height of the total window opening bounded by the window frame. It will thus be seen that the danger of a person falling out of my improved window. when the sashes are positioned directly opposite each other to give the maximum area of ventilation is correspondingly reduced. Further safety is provided by reason of the fact that through the agency of the connecting bands I61 and Ill both sashes maybe opened from the inside of the room by a person grasping the handgrip 41 and raising the lower sash.

Another advantage of the window described herein is that the guiding effect afforded by the weatherstrips which extend from the side rails of each sash into the grooves provided in the j amb of the window frame makes it possible to eliminate the parting strips 34 wherever such elimination is desirable or necessary.

Another advantage of the window described herein is that it provides for easy and convenient removal and replacement of the sashes. When it is .desired to remove one of the sashes this is easily accomplished by removing the screws anchoring the sash connecting bands to the upper and lower ends of the horizontally divided Weatherstrip holders mounted in the side rails of the sash. The upper and lower sections of the Weatherstrip holder are then removed from the groove in the side rail of the sash by sliding the upper section upwardly and the lower section downwardly.

The pulleys H8 and H9 at each side of the window are journalled in a pulley block I33 (Figs. 1 and 5) which is fastened to the side jamb of the window frame so that it constitutes a section of the parting strip at that side of the window. Each pulley block I33 is provided with a transverse passage I34 in which a sealing strip I35 is held with the ends of the sealing strip projecting beyond the sides of the pulley block and bearing against the adjacent side rails of the upper and lower sashes. This arrangement minimizes leakage of air between the side rails of the sashes and the parting strips.

Having thus described the nature of my invention and a preferred embodiment thereof, it will be understood that various modifications may be resorted to within the scope and spirit of the invention as defined by the appended claims.

I claim:

1. A window assembly comprising a window frame, upper and lower sashes slidable in said frame, each side rail of each sash being provided with a vertical groove extending the full length of said rail and opposed to a vertical sash guiding channel formed in the adjacent jamb of the window frame, sashguiding strips fitted in the grooves of each sash and provided with sash guiding projections slidably fitted in the opposing sash guiding channels of the window frame, each strip and its sash guiding projection being divided horizontally into upper and lower sections to facilitate removal and insertion of said strips, 2. pair of upper and lower pulleys secured to an intermediate portion of each jamb of the winaamuaa frame, a pair of upper and lower flexible ele men-ts; th upper flexible elements being trained around the upper pulleys located at the opposite sides of the wihdow frame' and having corresponding ends thereof anchored" to the upper extremities of the upper sections of the sash guiding strips carried bythe upper sash, the remaining extremities of said upper flexible elements being anchored to the upper extremities: of the upper sections of the sash guiding strips carried by' the lower sash, the 1ower flexible elements being trained around the lower pulleys located at opposite sides of the window frame and having corresponding ends thereof secured to the lower extremities of the sashguiding strips carried by the upper sash, the remaining ends of the said lower flexible elements" being secured to the lower extremities of the sash guiding strips carried by the lower sash frame.

2. A window assembly comprising a window frame, upper and lower sashes slidable insaid frame, sash guiding strips removably fitted in grooves provided in the side rails of each sash, said sash guiding strips being providedwith sash guiding projections slidably fitted in vertical guide channels formed in the jam-bs of the window frame, a pair of upper and lower pulleys secured to an intermediate portion of eachlamb of the window frame, a pair of "upper flexible elements trained. around the upper pulleys located at opposite sides of' the window frame, a pair of lower flexible elements trained around the lowerpulleys located at opposite sides of the window frame, the upper pair of flexible elements having corresponding" ends thereof anchored to the upper extremities or. theses guiding strips carried by the upper sash and having the: remaining ends thereof anchored to the upper extremities of the sashegu-iding strips: carried by the lower. sash, the lower pair of flexible elements having corresponding: ends thereof anchored to the lower extremities of" the sash guiding strips carried by the upper sash and having their remaining ends anchored to. the lower extremities of the sash guiding strips carried by the lower sash.

3. A window assembly. as set. forth in claim 2 in which the. sash guiding projection of each sash guiding strip comprises a relatively thin tongue-like member covered by Weatherstripping material engaging the defining walls of the sash guiding channel in which said projection is slidably fitted.

EDOUARD CLERK.

REFERENCES CITED The following, references are of record in thefile of this patent:

-UNITED STATES PATENTS Number Name Date; 872,434t Lawder v Dec. 3, 1.907 1,2I1,914 Campbell Jan. 9, 1917 1,673,393 Campbell June 12, 1928 1,681,134 Ruth -r Aug. 14;, 1928 got 1,959,643 Plym May 22', 193 1 2,304,063 Peremi et a1. Dec 8, 1942 2,317,581 Bianca Apr. 27, 1943 2,367,129 K'essler Jan. 9;. 1945 2,375,553 Hudson May 8, 1945 

